Analysis Developmental Trend of Tractor Transmissions from the Aspect of Improvement of Pulling and Dynamic Characteristics
Analiza trenda razvoja transmisija traktora sa aspekta poboljšanja vučno-dinamičkih karakteristika
View/ Open
Author
Petrovic, Predrag
Obradovic, Dragoljub
Keywords
tractortransmission
developmental
dynamic characteristics
agricultural
traktor
transmisija
razvoj
dinamičke karakteristike
poljoprivreda
Metadata
Show full item recordAbstract
Within the period of almost a hundred years of tardition, developmental
concept of transmissions of agricultural tractors has gradually been brought into accord
with engine power, tractor mass, velocity of movement and other requests, with the
purpose of finding permanent improvements of pulling and dynamic characteristics, and
all that with the view to optimizing agricultural and technical conditions and increasing
the degree of rationalization of production.
In the first phases of development of tractor transmissions shafting from engine was
effected through gradual gearbox and main gearing to driving wheels. In further decades
of development of trnsmission systems, more and more attention was paid to the
development of gearbox gearings particularly in the increase of gear shift. In that way,
optimal solution, i. e. the ideal pulling hyperbola, was nearer and nearer.
In tadey, s trend of development of tractor transmissions so-called automatic
transmissions have an ever increasing application, providing a continual shafting
depending on conditions of operation.
Tractors fitted with such types of transmissions have a much higher degree of power
utilization, i. e. more favourable potential pulling characteristic.
In this work a short review is given of the analysis of agricultural tractors
transmission from the aspect of improvement of pulling and dynamic characteristics. Koncept razvoja transmisije poljoprivrednih traktora kroz skoro stogodišnju
tradiciju vremenom se usklađivao sa snagom motora, masom traktora, brzinom kretanja i
drugim zahtevima, u cilju iznalaženja permanentnih poboljšanja vučno-dinamičkih
karakteristika, a sve u cilju optimiranja agrotehničkih uslova i povećanja stepena
racionalizacije proizvodnje.
U prvim fazama razvoja traktorskih transmisija snaga od motora se prenosila preko
stepenastog menjača i glavnog prenosnika do pogonskih točkova. U daljim decenijama
razvoja transmisionih sistema, sve veća pažnja se posvećivala razvoju menjačkih
prenosnika, pre svega u povećanju broja stepena prenosa. Na taj način sve više se
prilazilo optimalnom rešenju, odnosno približavalo idealnoj hiperboli vuče.
U današnjem trendu razvoja transmisija traktora sve veću primenu imaju tkz.
automatske transmisije koje obezbeđuju kontinualni prenos snage u zavisnosti od uslova
eksploatacije.
Traktori opremljeni sa takvim tipovima trasmisija imaju znatno veći stepen
iskorišćenja snage, odnosno povoljniju potencijalnu vučnu karakteristiku.
U ovom radu dat je kratak osvrt analize razvoja transmisije poljoprivrednih traktora,
sa aspekta poboljšanja vučno dinamičkih karakteristika, odnosno potencijalne vučne
karakteristiketr taktora.